Bed material for thermolytic fragmentation of sugars
AssigneeHaldor TopsøE A/S
InventorsChristian Mårup Osmundsen, Esben Taarning, Morten Boberg Larsen
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Abstract
The present invention relates to a process for thermolytic fragmentation of a sugar into a composition comprising C1-C3 oxygenates. In particular, it relates to the use of heat carrying particles providing improved yields of C1-C3 oxygenates and improved fluidization characteristics making it suitable for industrial scale production of e.g. glycolaldehyde. It also regards a circulating fluidized bed system comprising the heat carrying particles.
Claims29
A process for thermolytic fragmentation of a sugar into a composition comprising C1-C3 oxygenates, the process comprising:
- a. providing a circulating, fluidized stream of heat carrying particles, wherein the heat carrying particles are circulated to a heating zone to produce heated heat carrying particles, and then the heated heat carrying particles are circulated from the heating zone to a fragmentation zone to provide heat to the fragmentation zone and producing cooled heat carrying particles, and then the cooled heat carrying particles are circulated back to the heating zone for reheating;
- b. introducing a feedstock solution comprising the sugar into the fragmentation zone of the circulating, fluidized stream of heat carrying particles to absorb heat and convert the sugar by thermolytic fragmentation into the C1-C3 oxygenates;
- c. separating a fragmentation product stream comprising the C1-C3 oxygenates from the stream of cooled heat carrying particles;
- and then
- d. recovering the composition comprising C1-C3 oxygenates from the fragmentation product stream,
- wherein the number of acid sites on the surface of the heat carrying particles is less than 3 μmol/g as measured by NH3-TPD.
A process for thermolytic fragmentation of a sugar into a composition comprising C1-C3 oxygenates, the process comprising:
- a. providing a circulating, fluidized stream of heat carrying particles, wherein the heat carrying particles are circulated to a heating zone to produce heated heat carrying particles, and then the heated heat carrying particles are circulated from the heating zone to a fragmentation zone to provide heat to the fragmentation zone and producing cooled heat carrying particles, and then the cooled heat carrying particles are circulated back to the heating zone for reheating,
- b. introducing a feedstock solution comprising the sugar into the fragmentation zone of the circulating, fluidized stream of heat carrying particles to absorb heat and convert the sugar by thermolytic fragmentation into the C1-C3 oxygenates;
- c. separating a fragmentation product stream comprising the C1-C3 oxygenates from the stream of cooled heat carrying particles;
- and then
- d. recovering the composition comprising C1-C3 oxygenates from the fragmentation product stream,
- wherein the particle surface area of the heat carrying particles is below 3 square meters per g,
- wherein at least 90% by weight of the heat carrying particles consist of silicium, aluminium and oxygen and the mass ratio of silicium to aluminium is from 0.25 to 1.
A process for thermolytic fragmentation of a sugar into a composition comprising C1-C3 oxygenates, the process comprising:
- a. providing a circulating, fluidized stream of heat carrying particles, wherein the heat carrying particles are circulated to a heating zone to produce heated heat carrying particles, and then the heated heat carrying particles are circulated from the heating zone to a fragmentation zone to provide heat to the fragmentation zone and producing cooled heat carrying particles, and then the cooled heat carrying particles are circulated back to the heating zone for reheating;
- b. introducing a feedstock solution comprising the sugar into the fragmentation zone of the circulating, fluidized stream of heat carrying particles to absorb heat and convert the sugar by thermolytic fragmentation into the C1-C3 oxygenates;
- c. separating a fragmentation product stream comprising the C1-C3 oxygenates from the stream of cooled heat carrying particles;
- and then
- d. recovering the composition comprising C1-C3 oxygenates from the fragmentation product stream,
- wherein the number of basic sites on the surface of the heat carrying particles is less than 1 μmol/g as measured by CO2-TPD.
Dependencies are inferred from the claim text.